62221661 has 2 divisors, whose sum is σ = 62221662. Its totient is φ = 62221660.

The previous prime is 62221657. The next prime is 62221721. The reversal of 62221661 is 16612226.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59382436 + 2839225 = 7706^2 + 1685^2 .

It is a cyclic number.

It is not a de Polignac number, because 62221661 - 2² = 62221657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 62221661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (62221961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31110830 + 31110831.

It is an arithmetic number, because the mean of its divisors is an integer number (31110831).

Almost surely, 2^62221661 is an apocalyptic number.

It is an amenable number.

62221661 is a deficient number, since it is larger than the sum of its proper divisors (1).

62221661 is an equidigital number, since it uses as much as digits as its factorization.

62221661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 62221661 is about 7888.0708034348. The cubic root of 62221661 is about 396.2602721350.

Adding to 62221661 its reverse (16612226), we get a palindrome (78833887).

The spelling of 62221661 in words is "sixty-two million, two hundred twenty-one thousand, six hundred sixty-one".